/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
FSpawnTabArgs ( const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > & InOwnerWindow, const [FTabId](API\Runtime\Slate\Framework\Docking\FTabId) & InTabBeingSpawenedId )